Improvement in expansible weaverss reeds



B. ADAMSON. Expan-sible Weave'rs Reed.

No. 212,120. Pa'ten ted Feb. 11, 1879.

WlTNESSES. INVENTDH MPHHS, PHOTO-UTHOGRAPHER, WASHINGTON, DV 6.

UNITED STATES PATENT OFFICE.

EDWARD ADAMSON, OF PROVIDENCE, RHODE ISLAND.

IMPROVEMENT IN EXPANSIBLE WEAVERS REEDS.

Specification forming part of Letters Patent No. 212,120, dated February11, 1879; application filed April 3, 1878.

To all whom it may concern:

Be it known that I, EDWARD ADAMSON, of Providence, Rhode Island, haveinvented cer tain Improvements in WVeavers Reeds, of which the followingis a specification:

My invention is an improvement on what are known as expansible weaversreeds, and it consists of a double spiral spring, composed of two singlespiral springs interlacing each other and encircling metallic rods,which pass through slots in the ends of the dents.

It has forits object to provide a reed that will be capable of expandingor contracting, to embrace a wide range of combs, so that, instead ofthe weaver requiring a separate reed for each change in cloth, it willonly be necessary for him to draw out or contract his reed to therequired spread of the yarn.

In my drawings, Figure 1 is a perspective view of one of the dents,showing the position and shape of the openings or slots therein. Fig. 2is a front view of a portion of the reed, showing the dents, springs,and supportingrods. Fig. 3 is a sectional view of the reed,

- showing the relation between the dents,

springs, and rods which compose the reed.

Similar reference-letters indicate like parts in all of the figures.

Referring to drawings, A A are the dents, arranged in the usual way, inparallel lines, provided with slots B B at their ends. 0 are the rodswhich pass through the slots of the dents, and are bound together withthe interlacing spiral springs D D D D.

It is apparent that when additional dents are required in the reed it isonly necessary to slip them in betweenthe coils of the springs D D,outside of those already in, and to pass the rods 0 through the slots ofthe added dents, and secure the ends of the springs and the rods in asuitable manner. The spacing of the dents will be reduced or increasedas the dents are added or taken away from the reed.

In carrying out my invention, I use the double spiral spring, composedof two single spiral springs interlacing with each other. The dents inmy reed have slots in each of their ends thrice as long as their width,so that when placed in the springs each slot is divided into threesections by the springs, and through one or more of said sections I passmetallic rods large enough to fill up the space,

but not so as to interfere with the expansive force of said springs orthe free rectilinear motion of the dents. The rods, with the springs,support the dents at each end, and connect them firmly.

I am aware of English Patent No. 2,850 of 1858, in which spiral springsare used, in combination'with suitable substitutes, for the ordinarydents, and this arrangement I do not claim.

I am also aware of the patent of Nichols, 46,381, in which one or moreof the outer dents of the reed are secured with interposin g elasticwashers; and to such I make no claim.

What I claim as my invention, and desire to secure by Letters Patent,is-

In an expansible weavers reed, the double interlacing spiral springs DD4 D" D, in combination with dents A, provided with slots at both ends,and the bars 0, passing through the dents and the springs, as and forthe pur pose set forth.

EDWARD ADAMSON.

Witnesses:

JOSEPH ADAMSON, RICHARD WHALIN.

